F_GETLK           135 src/dps8/shm.c           if (fcntl(lck_fd, F_GETLK, &bflock) == 0 && bflock.l_pid > 0)
F_GETLK           255 src/dps8/shm.c       if (fcntl(fd, F_GETLK, &lock) == FALSE && lock.l_pid > 0)
F_GETLK           279 src/simh/sim_fio.c       if (fcntl(fileno(fsc), F_GETLK, &lock) == 0 && lock.l_pid > 0)